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Second-priority errors are those that could affect individual programs, but the TS is still intact. The types of problems these errors can cause are frozen frames and loss of lip sync. Tests for these faults on the stream analyzer include:

Transport error: This flag is set in the TS header by the demodulator if it can't correct errors in the stream.

CRC error: This indicates that a CRC error (data corruption) occurred in any of the following tables — CAT, PAT, PMT, NIT, EIT, BAT, SDT or TOT.

PCR error: This flag is raised if the primary clock reference (PCR) is not seen for more than 100ms. The time interval between two consecutive PCR values should be no more than 40ms. This type of error can cause the decoder to lose lock on the 27MHz clock.

PCR repetition error: This error occurs when the time interval between two consecutive PCR values is more than 40ms and can cause the 27MHz clock to drift or lose lock.

PCR discontinuity indicator error: If the difference between two consecutive PCR values is outside the range of 100ms, this error can occur.

PCR accuracy error: This error can occur when the PCR accuracy of the selected program is outside the range of ±500ns.

PTS error: This occurs when the presentation time stamp (PTS) repetition is more than 700ms. The PTS is contained in the MPEG-2 program stream and is used to aid the decoder in presenting the program on time, at the correct speed and synchronized. The PTS is compared to the PCR.

CAT error: This is used for conditional access programs (paid programming).